Special features of kinetics of high-temperature oxidation of VK8VK alloy

Gumnitskii, Ya. M.; Pelekh, M. P.; Givlyud, N. N.

doi:10.1007/bf00722000

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International Journal Of Engineering Research and Technology (Ijert)1

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2022

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Cited by 6 publications

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“…Colding and König (1971) were able to correlate the extent of wear of WC-Co with the penetration of oxygen measured in the diffusion of radioactive isotopes. In effect, the oxidation of WC has an energy of activation between 1 (Gumnitskii, Pelekh, & Givlyud, 1989) and 1.6 eV (Larikov, Tishkova, Tyshkevich, & Shmatko, 1990).…”

Section: Continuous Cutmentioning

confidence: 98%

Mechanical Behavior of Hardmetals at High Temperature

Mari

2014

Comprehensive Hard Materials

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Section: Continuous Cutmentioning

confidence: 98%

Mechanical Behavior of Hardmetals at High Temperature

Mari

2014

Comprehensive Hard Materials

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“…4 which show that oxidation is completed at the two aforementioned heating rates at about 700 °C. The first peak corresponds to oxidation of cobalt followed by oxidation of tungsten carbide [19] while the second relates to final oxidation of remaining WC to CoWO4 + WO3. Higher heating rates show a somewhat different behavior.…”

Section: International Journal Of Engineering Research and Technology (Ijert)mentioning

confidence: 99%

Oxidation Kinetics of Tungsten Carbide- 20cobalt Composite using Non-Isothermal Thermal Analysis

Aly¹,

Hamad²,

Abdel-Hamid³

et al. 2018

IJERT

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This study presents non-isothermal analysis of the oxidation behavior of tungsten carbide 20% cobalt powder. This was done to further understand and quantitatively model of this process. The effect of heating rate from 5 to 20 °C/min on the oxidation behavior was examined. The specimens were heated in air from ambient temperature up to 1000 °C using the aforementioned heating rates. XRD was used to assess the phases present in the original powder as well as specimens heated to different temperatures. The phases present in the green powder were WC, W2C and metallic cobalt, while the phases appearing at 600 °C were WC, WO3 and CoWO4 and those present at 1000 °C were WO3 and CoWO4. Kinetic calculations were carried out, the value of activation energy was calculated at different conversions using the Flyn -Wall -Osawa method, and the average value was about (255 kJ/mole). The corresponding activation energy values calculated by the Coats -Redfern method were lower (140 kJ /mole).

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Tungsten Carbides

Shabalin

2022

Ultra-High Temperature Materials IV

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Special features of kinetics of high-temperature oxidation of VK8VK alloy

Cited by 6 publications

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Mechanical Behavior of Hardmetals at High Temperature

Mechanical Behavior of Hardmetals at High Temperature

Oxidation Kinetics of Tungsten Carbide- 20cobalt Composite using Non-Isothermal Thermal Analysis

Tungsten Carbides

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